Revert of [regexp] Add stub for RegExpExec instead of inlining

src/code-factory.cc

Index: src/code-factory.cc
diff --git a/src/code-factory.cc b/src/code-factory.cc
index 0d635e64722ad21c71503534f88ea5375b996122..1fbeec308e32b9039462076b164b15646cd30eb9 100644
--- a/src/code-factory.cc
+++ b/src/code-factory.cc
@@ -265,14 +265,6 @@
 #undef TFS_BUILTIN
 
 // static
-Callable CodeFactory::RegExpExecInternal(Isolate* isolate, bool is_fastpath) {
-  Handle<Code> code(is_fastpath
-                        ? isolate->builtins()->RegExpExecInternalFast()
-                        : isolate->builtins()->RegExpExecInternalSlow());
-  return Callable(code, RegExpExecInternalDescriptor(isolate));
-}
-
-// static
 Callable CodeFactory::StringAdd(Isolate* isolate, StringAddFlags flags,
                                 PretenureFlag pretenure_flag) {
   StringAddStub stub(isolate, flags, pretenure_flag);